"A nuclear reactor on the California coast will remain shut down indefinitely while a team of federal inspectors determines why several relatively new tubes became so frail that tests found they could rupture and release radioactive water, a federal official said Thursday."

Underscoring concern over the test findings, the NRC dispatched a special team to the Unit 3 reactor at the San Onofre Nuclear Generating Station, located about 45 miles north of San Diego. The plant was shut down as a precaution on Jan. 31, after a radioactive water leak in another tube in a massive steam generator. Traces of radiation escaped, but officials say there was no danger to workers or neighbors."